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- <div class="section" id="random-access-sequence">
- <h1><a class="toc-backref" href="./concepts.html#id1397">Random Access Sequence</a></h1>
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- <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
- <p>A <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a> is a <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a> whose iterators model
- <a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a>. A random access sequence guarantees amortized constant
- time access to an arbitrary sequence element.</p>
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- <h3><a class="subsection-title" href="#refinement-of" name="refinement-of">Refinement of</a></h3>
- <p><a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a></p>
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- <h3><a class="subsection-title" href="#expression-requirements" name="expression-requirements">Expression requirements</a></h3>
- <p>In addition to the requirements defined in <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>,
- for any <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a> <tt class="literal"><span class="pre">s</span></tt> the following must be met:</p>
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- <tr><td><tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt></td>
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- <td>Amortized constant time</td>
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- <td>Amortized constant time</td>
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- <td>Any type</td>
- <td>Amortized constant time</td>
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- <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
- <p>Semantics of an expression is defined only where it differs from, or is not
- defined in <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</p>
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